ESB-2018.0218 - [Win][UNIX/Linux][FreeBSD] unbound: Denial of service - Remote/unauthenticated 2018-01-22

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0218
              A vulnerability has been identified in unbound
                              22 January 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           unbound
Publisher:         FreeBSD
Operating System:  FreeBSD
                   UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Denial of Service              -- Remote/Unauthenticated
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-15105  

Original Bulletin: 
   http://www.vuxml.org/freebsd/8d3bae09-fd28-11e7-95f2-005056925db4.html

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than FreeBSD. It is recommended that administrators
         running unbound check for an updated version of the software for 
         their operating system.

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unbound -- vulnerability in the processing of wildcard synthesized NSEC 
records

Affected packages

unbound < 1.6.8

Details

VuXML ID 8d3bae09-fd28-11e7-95f2-005056925db4

Discovery 2017-10-08

Entry 2018-01-19

Unbound reports:

We discovered a vulnerability in the processing of wildcard synthesized NSEC 
records. While synthesis of NSEC records is allowed by RFC4592, these 
synthesized owner names should not be used in the NSEC processing. This does,
however, happen in Unbound 1.6.7 and earlier versions.

References

CVE Name CVE-2017-15105

FreeBSD PR ports/225313

URL https://unbound.net/downloads/CVE-2017-15105.txt

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